CS2D 1.015 Update

Another small maintenance update! Here are the changes

[INFO] Thanks again to EngiN33R for his contributions (marked with his name).

[FIXED] inentityzone now correctly handles custom area entities (EngiN33R)
[FIXED] os.info now returns proper values (EngiN33R)
[FIXED] Vulnerability which allowed crashing servers with forged UDP messages
[FIXED] Vulnerability which allowed to write downloaded files outside CS2D folder
[ADDED] Command "settile": New optional rotation, color (R,G,B) and blending params (EngiN33R)
[ADDED] Lua itemsat function to get table of items at specific tile (EngiN33R)
[ADDED] Lua imagehitzone 200 modes to define movement collisions (EngiN33R)
[ADDED] Lua frame hook with delta time parameter (EngiN33R)
[ADDED] Lua post_endround hook which triggers exactly at end of round (EngiN33R)
[ADDED] Albanian translation (thanks to koldfreg1)
[CHANGED] use Lua imageshadow argument as shadow height (EngiN33R)